Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '809b1724e00adadd99710ea55ad208d5b99e55431cf83717914d77f136e34f5e' 
  AND token = 'OIvLVHby9unxUF1+9WnVC+EiSovVjevWF0vUVzHP6vo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}